package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import javafx.scene.control.SeparatorMenuItem;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper,Setmeal> implements SetmealService {



    @Autowired
    private SetmealDishService setmealDishService;


    @Transactional
    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐基本信息，操作setmeal，执行insert操作
        this.save( setmealDto );

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map( (item)->{
           item.setSetmealId( setmealDto.getId() );
           return item;
        } ).collect( Collectors.toList() );


        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch( setmealDishes );



    }

    /**
     * 删除套餐，同时删除套餐和菜品的关联数据
     * @param ids
     */
    public void removeWithDish(List<Long> ids) {
        //select count(*) from setmeal where id in(1,2,3) and status = 1
        //查询套餐状态，确定是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper  = new LambdaQueryWrapper<>();
        queryWrapper.in( Setmeal::getId,ids );
        queryWrapper.eq( Setmeal::getStatus,1 );

        int count = this.count( queryWrapper );
        if (count>0){
            //不能删除，即抛出一个业务异常
            throw new CustomException( "套餐正在售卖，不能删除" );
        }


        //如果可以删除，先删除套餐表中的数据
        this.removeByIds(ids  );


        //删除关系表中的数据
        LambdaQueryWrapper <SetmealDish>queryWrapper2 = new LambdaQueryWrapper<>();
        queryWrapper2.in( SetmealDish::getSetmealId,ids );

        setmealDishService.remove( queryWrapper2 );


    }


}
